Keyboard mechanism for line-casting and kindred machines.



ITNITED sfra rns PATENT onlmcn.

\ j 'KEYB R MECHANISM For.nziincns'rrue-enn'KiNnnnn-nnenmns. 1,;

- To-izZ-Ziwhohtitinayjconcem:

Be itlmownthat I, PHILIP T. Donen, of f Washington, in the. District of Columbia. havednvented a new and useful Improvement" infKeyboard' ltiechanism, for Line- Castingand Kindred Machines, of which the following is specification. 1 i 1 My invention has reference to mechanism of a' general character represented in 'Lett'rs- Patent of the ,United' States) to Philip ,Tell, DodgeNOQ53093l dated ISthDecember,

. of the lever.

} 1894. ,;The mechanism ofthis class of escapement device for releasing the type matrices from .their magazines is actuated by power driven devices controlled by finger keys. ln pr'a c tice it sometimes happens thatthe movement fof the escapement mechanisin is resisted by the presencev of the matrix in an improperposition or by other causes and in such event it is'necessary that-provision should be made for relieving the parts of the strain to which they would otherwise be subjected by the driving mechanism.. Mv-invention has reference to improved -.means for relieving the parts from strain .Jaml' to this end consists in a yoke or lever for actuating the reeds provided with a springaof such strength that while it would operate the reed and escapement under rdinary conditions it will yield in the event of the escapementmeeting with undue resistance. I

WVith the exception of the parts hereim after described and specifically claimed the mechanism may be in all respects of the ordinary or any suitable construction.

Referring to the drawings, Figure 1 is a vertical section of an escapement mechanism and the parts for actuating the same through the lower end of the magazine. Figs. 2, 3, 4 and 5 are views showing alter native or equivalent forms on which a spring may be applied.

Referring to Fig. 1 (1 represents an inclined channeled magazine adapted" to carry the matrices b. 0 represents one of. the series of cscapement levers -mounted on a central pivot and provided at opposite ends with two'upwardly extending pawls which are alternately projected into and withdrawn from the magazine by the vibration d is a spring acting on the rear end of the es'capeinen .e' is a vertical-reedniounted'f in. g d s f g and positioned to act hence rear end. of the escapeme'nt le v "board serving to operate the entire" series for each channel in the-mags tin position to engage .beneatli-fthe I n order to sustain -the;latte1? atat one end with the dog-la 'tion between the roll and the ca 7 1 '01 este med, Assienen ro innnsniiispeciiication of Letters-intent. 1Pa{;,g f dD 3 1914 Applicationfile'd september 28, 1310 Serial No. '54 ,243.t v v I ing the forward pawl in an elev I, v

peratlve position as sh'o'wn'in the releaseolf the matrix. 3 2. is a horizon or leverinounted at one end on a h pivot 2 and arranged "at' tl re' opposi beneath thereed-e for the purpose of httiifig the same. fThe' cam yoke'iz containsna cam j/ mounted on. a horizontal p vot in the yoke.

70 is a horizontalconstantly, driven 'rollex tending across theenti're widthofthe-ke of 'cams' and "yokes', of which angular dog mounted. one horizonta as to p '1*eve1it contact between theroll n) is avertical I r A nth-arranged to be lifted. at tlielowerend byltheiingerikeyr: lever 11 which is pivot'ed'midvay of its length. 0 is a stationary pin or stop;-;=arranged to engagethe ca m j w hen the Fee is in its elevat d positi'onin orderr'te vent its heavier side frem'talli ng renia turely into. engagement with thevreit tn-, 'So far asdescrihedthe-parts arehfiOr d inary construction. lV-h en -the' key lever 35 v n is actuated the ;bar 124 disengagesthe dog Z I from the yoke h which descends gr vity permitting the cam 7' to engage .a underlying roll 0 and disengage... V f. stop pin 0'. As s'oonas this occi the latter to turn upon its axis and Di, ;2. t 0 the eccentricity of the calm. which is supported for; the time being onthe surface of the roll'k' it acts in turn to lift-the' yoke 72. to and above its original position, causing it in turn to lift the reed e and actuate the cscapement. The finger key being released the dog [assumes its original position and arrests the yoke when the latter falls to the original level.

In the mechanism heretofore constructed it has been customary for the yoke h to act directly against the lower end of the reed e. Carrying my invention into -effect I introduce between the lower end of the reed e zo the lower end being riveted to'the under and the yoke a spring of any suitable form gattaclied-to or carried by the; yoke, so that *in the event of the escapement lever'and reed offering an excessive resistance tothe rise ofthe yoke the spring may yield and permit the-yoke to rise without undue strain upon the parts. w

In' Figs'l and 2? represents this spring inthe form of a fiatleaf seated on top of the of the spring at its rear or near end. The

yoke and secured thereto by rivets 72 passing through ears bent down from the sides outer end of the spring stands above and out of contact with the yoke andit is of strength sufiicient to 'overcomethe resistance "-of the escapement spring d and cause the proper operation of the.escapement under normal conditions. i

In Fig. 3 P represents the spring of U form made of sheet steel or equivalent metal,

side "otthe yoke; it is extended forward andupWard-and returnedover the top of theyoke and positioned to receive the lower y y I 1 1 In Fig. i the spring P is of spiral form end of the reed e.

and" is seated on the-upper side of the 'yoke around the'stem or spindle formed on the "lower'end of the reed e and extended dow through a hole. in the yoke.

In Fig. 5 the spring oi spiralform is a seated in' a Vertical hole inthe yoke beneath the lower end of the reed a which is extended 'downwardinto the hole. 5 It will be noted that in each instance the yoke carries or supports the spring, which 1 in'turn actuates' the reed. lhe construction is" simple and inexpensive. It prevents the "possibility of the breakage of 'the'escapement or of the injury to matrices thereby. The application of the spring to the yoke is advantageous-in that it makes the parts to be readilyassembled, readily inspected,

. and also in'tha't it permits each yoke to be individually and quickly removed in the event of the spring needing adJustment or replacement! Havingthus described. my invention, I

claim and desire to secure Letters Patent:,

1. in a keyboard mechanism of theclass described, the combination of. an actuating.

reed, a movable horizontall disposed cam yoke for operating the reed and arranged in immediate proximity thereto, said yoke being pivotally mounted at one end, and a spring interposed between the other end of the yoke and the reed and" through which the operating movement of the yoke is v reed, a movable, horizontally-disposed cam. yokefor operating'the reed, said yoke being pivotally mounted at one end, and a spring interposed betweenthe other end of theyoke and the reed and carried by the yoke, and through which the operatingmovement of the yoke is transmitted to the reed. r

In a'keyboard mechanism of the class described, the combination of an actuating reed, a movable, horizontally-disposed cam yoke for operating the reed, said yoke being pivotally mounted at one end, and a yielding element arranged in engagement with the other end of the yoke and the lower end of the-reed and through which the operating movement of the yokeis. transmitted to the reed. I

In testimony whereof I hereunto set my hand this 21st day of September,'l910,' 1n

the presence of two. attesting Witnesses. I

y Y PHILIP TQDOD E.

Witnesses:

FE. J. LAKE, 

